Cerium

Latin nameCerium
English nameCerium
chemical symbolCe
atomic number58
relative atomic mass140,115
period6
groupIII.B
classificationlanthanides
discovery year1803
discovererBerzelius
Hisinger
melting point [°C]798
boiling point [°C]3433
density [g cm-3]6,78
density at melting point [g cm-3]6,55
electronegativity [Pauling]1,12
oxidation statesII, III, IV
electron configuration[Xe]4f1 5d1 6s2
covalent radius [pm]165
specific heat [J g-1K-1]0,19
heat of fusion [kJ mol-1]5,46
thermal conductivity [W m-1 K-1]11
el. conductivity [S m-1]1,4.106
1. ionizing potential [eV]5,5387
2. ionizing potential [eV]10,851
3. ionizing potential [eV]20,2
Mohs hardness2,5
Vickers hardness [MPa]270
Brinell hardness [MPa]412
shear modulus [GPa]14
Young's modulus [GPa]34
point of superconductivity [K]0,022
state at normal conditionssolid

Cerium is an iron-gray lustrous metallic element.

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